JPS59191149A - Mechanism for controlling optical record - Google Patents
Mechanism for controlling optical recordInfo
- Publication number
- JPS59191149A JPS59191149A JP58066553A JP6655383A JPS59191149A JP S59191149 A JPS59191149 A JP S59191149A JP 58066553 A JP58066553 A JP 58066553A JP 6655383 A JP6655383 A JP 6655383A JP S59191149 A JPS59191149 A JP S59191149A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- laser beam
- track
- recording track
- irradiation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、光学式のディスクレコーダＱ）言己録市ｕ御
機構に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an optical disk recorder (Q) recording mechanism.
（０）従来技術
光学式ディスクレコーダは、一般＝工己録イｇ号（こよ
って変調した高出力のレーザービームをディスク面に照
射して、ディスク面上にビ・／トを形成したり、ディス
ク面の磁、化方向を変更している。(0) Conventional technology Optical disc recorders are generally used to irradiate a modulated high-power laser beam onto the disc surface to form bits on the disc surface. The magnetic direction of the disk surface has been changed.
この種のディスクレコーダは、２［ｌ！録トラックの形
成直後、直ちに再生モー）・”となり、記録ト・ランク
の形成状態を確認している。しかし、再生モードで記録
トランクに照射される再生レーデ−ビームは、低出力で
はあるか記録トラックを加熱する。よって、冷めていな
い記録トラック、に無変調の再生レーサービームを熱湯
４すれは、３己録ビツトか変形したり、磁化の方向が変
化しで、記録特性を損う惧れがある。This kind of disc recorder has 2[l! Immediately after the recording track is formed, the playback mode is activated and the state of formation of the recording trunk is confirmed. Heating the track.Therefore, if you apply an unmodulated reproducing laser beam to hot water on a recording track that has not yet cooled down, there is a risk that the recorded bits may be deformed or the direction of magnetization may change, damaging the recording characteristics. There is.
旧述する現象は、記録前記録部分を予熱したり、ディス
クを映像信号フレームＭ１期で記録するタイプのディス
クレコーダに顕著に現われる。The previously described phenomenon appears conspicuously in a type of disc recorder that preheats the recording portion before recording or records the disc in the M1 period of the video signal frame.
（ハ）発明の目的・
そこで、本発明は、上述する点に鑑み、再生レーザービ
ームの照射による記録トラックの記録特性の劣化を防止
する新規且つ有効な光学式記録制御機構を提案するもの
である。(c) Purpose of the invention In view of the above-mentioned points, the present invention proposes a new and effective optical recording control mechanism that prevents deterioration of recording characteristics of recording tracks due to irradiation with a reproduction laser beam. .
（ニ）発明の構成
本発明は、記録トラック形成直後、記録トラックが再生
ビームの照射によって劣化しない温度に降下する迄１．
該記録トランクに対する再生レーサービームの照射を禁
止４−ることを特徴とするものである。(D) Structure of the Invention In the present invention, immediately after the recording track is formed, until the temperature of the recording track drops to a temperature that does not deteriorate due to irradiation with a reproduction beam, 1.
This system is characterized in that irradiation of the recording trunk with a reproduction racer beam is prohibited.
実施例
以下、本発明を図示する一実施例に従い説明する。本実
施例は、ディスク面に形成した同心固状のガイトドシッ
クに沿ってビットを形成して１周当り１フレ一ム分の映
像信愕を記録するテ、ｒスクレコーダに本発明を採用す
るものであり、記録直後の発光レベルを再生レーザービ
ームの７ヘルより小さく設定することを特徴とり一るも
のである。EXAMPLE Hereinafter, the present invention will be explained according to an illustrative example. In this embodiment, the present invention is applied to a Te/R scratch recorder that forms bits along concentric rigid guides formed on the disk surface and records one frame worth of video per revolution. This is characterized in that the light emission level immediately after recording is set to be lower than 7 Hers of the reproduction laser beam.
第１図は、ダイオードに流す電ＢＥとレーザーダイオー
ドの発光ビームエ不ルキーの関係を示す図でおり、レー
ザーダイオードは、スレッンユホールドレベルを越す電
流値（Ｉ８）であり、レーザーダイオードで所定の発光
状態となる。Figure 1 is a diagram showing the relationship between the electric current BE flowing through the diode and the emitted beam energy of the laser diode. state.
本実施例では、記録直後のドロップ電流Ｉｒ ＜再生
電流■２〈ブレヒート電流ＩＰＲ・〈記録電流■Ｒなる
関係に各電流値を設定しており、照射ビームのエネルギ
ーは、発光ビーム上ネルキーか光学系で損失を来す結果
、ドロノブ時に０．５〜１ｍｗ、再生時に１〜２ｍｗ、
ブレヒート時に３〜４ｍｗ、記録時に６〜７ｍｗに設′
定しでいる。In this example, each current value is set in the following relationship: drop current Ir immediately after recording < reproducing current ■2 <breathing current IPR・<recording current ■R, and the energy of the irradiation beam is As a result of the loss in the system, 0.5 to 1 mw during drone operation, 1 to 2 mw during regeneration,
Set to 3 to 4 mw during break heat and 6 to 7 mw during recording.
It is fixed.
尚ビームエネルギーに幅がある理由は、内周と外周に於
てトラックの相対速度か異なるためである。」二連する
ヒームユネルキーか照射されると、ブレヒート時はトラ
ンクが１５０°Ｃ程度に、また記録時は３００°Ｃ程度
に達し、再生時にも＋００°Ｃの温度となる。The reason why there is a range in beam energy is that the relative speed of the track differs between the inner and outer circumferences. '' When two successive heat waves are irradiated, the temperature of the trunk reaches approximately 150°C during breathing, approximately 300°C during recording, and +00°C during playback.
第２区は、本実施例レーザー駆動回路を示しており、レ
ーザータイオード（Ｄ）は記録信号を入力する差動対ト
ランジスタ（Ｑｌ＞（Ｑ２＞の一方のコレクタ側に配さ
れており、共通エミ・／夕とアース間に配した振幅制御
トランジスタ（Ｑ６）によって記録電流の振幅（ＩＲ−
ＩＰＲ＞を定めている。また、第２トランシスク（Ｑ２
）のコレクタとアース間には交流阻止用コイル（Ｌ＞と
直流制御トランジスタ（Ｑ４〉が配きれており、前記直
流制御トランジスタ（Ｑ４）のベースには第１〜第３ア
ナログスイツチ（Ｓ、）（Ｓ２）（Ｓ６）を介して３種
類の制御電圧（Ｖ、）（Ｖ２ン（■５）が入力される。The second section shows the laser drive circuit of this embodiment, where the laser diode (D) is arranged on the collector side of one of the differential pair transistors (Ql>(Q2>) that input the recording signal, and The amplitude of the recording current (IR-
IPR>. Also, the second transisk (Q2
An AC blocking coil (L>) and a DC control transistor (Q4) are arranged between the collector of the DC control transistor (Q4) and the ground, and first to third analog switches (S, ) are arranged at the base of the DC control transistor (Q4). Three types of control voltages (V, ) (V2 - (5) are input via (S2) and (S6).
第１〜第３可変抵抗（ＶＲ、）（ＶＲ２）（ＶＲ５）は
、それぞれこれらの第１〜第３制御ｔｌＥ（Ｖ １）（
Ｖ ２ ＞（Ｖ ５ ＞４７） Ｌ＝ ヘＬを設定して
いる。前記各アナロクスイッチ〈Ｓｌ〉（Ｓ２）（Ｓ３
）の制御信号及び振幅制御トランジスタ（Ｑ５）の−＼
−ス入力は、シスフン回路（１）より発せられる。この
シスフン回路（１）には、記録映像信υ″（ｖＤ）より
垂直同期信号（ＶＳ）を分離する同期分離回路＜２）の
出力の他記録指令信号（ＲＥＣ）等が人力される。 尚
、前述する第１〜第３制ＯＩｌ電圧（Ｖ＋）〜（ＶＳ）
は、直流制御トランジスタ（■４）に、ブレヒート電流
（ＩＰＲ）、再生電圧（Ｉｐ）、ドロノブ電ｌｉＥを流
ず様な値に予め設定きれている。 従って、本実施例回
路で記録をする場合には、まず記録時期モードで、第１
アナログスイツチ（Ｓｌ）が閉して、レーザーダイオー
ドにブレヒート
電流を流し、トランクを１５０°Ｃ程度に温める。The first to third variable resistors (VR, ) (VR2) (VR5) respectively control these first to third control tlE(V1)(
V 2 >(V 5 >47) L= is set. Each analog switch <Sl> (S2) (S3)
) control signal and amplitude control transistor (Q5) -\
- input is generated from the sysphun circuit (1). This sysphun circuit (1) receives the output of the synchronization separation circuit <2) that separates the vertical synchronization signal (VS) from the recorded video signal υ'' (vD), as well as the recording command signal (REC) and the like. , the first to third OIl voltages (V+) to (VS) mentioned above.
are set in advance to values such that the bleed current (IPR), reproduction voltage (Ip), and Dronobu electric current do not flow through the DC control transistor (4). Therefore, when recording with the circuit of this embodiment, first the first
The analog switch (Sl) closes, causing a bleed current to flow through the laser diode, warming the trunk to about 150°C.
次に記録指令信号（ＲＦＣ）の発生に伴い、前記振幅制
御トランジスタ（Ｑ５）が垂直同期信号（ＶＤ）に同期
して１フレ一ム期間たけ導通せしめられ、記録電流く工
Ｒ）が前記レーザーダイオード（Ｄ＞に流れ記録モード
となる。１フレームの記録モード終了と同時に本実施例
では前記振幅制御トランジスタ（Ｑ５）が非導通となり
、前記第１マサロクスイノテ（Ｓｌ ）が開路きれると
共に、第３アナログスイツチ（Ｓ３）が閉路され、前記
第３アナログスイ／チ（Ｓ３）か５〜６フレ一ム分閉路
されて、再生時期モードとなる。この再生時期モード中
に、光学系は制御を維持し乍ら、ティスフは記録トラ／
り温度を室温程度に迄下（つる。再生時期モード終了と
同時に第２アナログスイ／千（Ｓ６）が閉路され、ｌｉ
７とレーザータイオード（Ｄ）に再生電流を流し再生モ
ードとなり、冷めた記録トラ／り、を再生する。Next, in response to the generation of the recording command signal (RFC), the amplitude control transistor (Q5) is made conductive for one frame period in synchronization with the vertical synchronization signal (VD), and the recording current (R) is turned on by the laser beam. The diode (D>) enters the recording mode. Simultaneously with the end of the recording mode for one frame, in this embodiment, the amplitude control transistor (Q5) becomes non-conductive, the first mass input transistor (Sl) is disconnected, and the third analog The switch (S3) is closed, and the third analog switch (S3) is also closed for 5 to 6 frames to enter the playback time mode. During this playback time mode, the optical system maintains control. However, Tisfu is a record tiger/
At the same time as the regeneration timing mode ends, the second analog switch/thousand (S6) is closed, and the temperature is lowered to about room temperature.
A reproducing current is applied to 7 and the laser diode (D) to enter the reproducing mode and reproduce the cooled recording track/receiver.
尚本実施例では、少くとも第１・第２制御電圧及び記録
電流幅はティスフの記録位置に応して変更する８便があ
り、例えはビックアンプの照射位置検出信号によって、
レーザーダイオードに対する電＃ｉ電圧と各可変抵抗に
対する電源電圧を変更しても良い。In this embodiment, there are eight ways in which at least the first and second control voltages and the recording current width are changed according to the recording position of the tisf. For example, depending on the irradiation position detection signal of the big amplifier,
The voltage #i for the laser diode and the power supply voltage for each variable resistor may be changed.
またｎＩＩ述する実施例では、記録直後ビームの照射位
置をそのままに、照射エネルギーを降下せしめたが、本
発明は前述する実施例に留まらず、記録直後ビームを再
生レーザービームとす−ると共に該当する記録トラ／り
を一定時間外して別トラックを再生しても良い。In addition, in the embodiment described above, the irradiation energy was lowered while leaving the irradiation position of the beam immediately after recording unchanged; however, the present invention is not limited to the embodiment described above, and the beam immediately after recording is used as a reproduction laser beam, and the irradiation energy is lowered. It is also possible to play back another track by leaving off the recorded track/re for a certain period of time.
（へ）発明の効果
よって、発明によれは、記録直後再生■・−ザーヒーム
によって記録トラックが再加熱されて、２釘特性を損わ
れることがなく、その効果は大である。(f) Effects of the invention According to the invention, the recording track is not reheated by the reproduction immediately after recording (1)--Zaheem and the two-nail characteristics are not damaged, and the effect is great.
第１図は、本発明の一実施例に係るレーザーダイオード
の記録電流特性説明図、第２図は同実施例の要部回路図
をそれぞれ示す。
王な図番の説明
（Ｄ＞・・・レーザーダイオード （ＩＤ＞・・・ド
ロップ電７ｔ（ＩＰ）・・・再生電流 （１，、Ｒ＞
・・・プレヒート電流 （ＩＲ）・・・記録電流
第■図
第２図FIG. 1 is an explanatory diagram of recording current characteristics of a laser diode according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a main part of the embodiment. Explanation of the main drawing number (D>... Laser diode (ID>... Drop current 7t (IP)... Reproduction current (1,, R>
...Preheating current (IR) ...Recording current Fig. 2
Claims (1)
て変調した高出力の記録レーザービームを只俣携、Ｉし
で記舒トランクを形成し、前記記録トラ／りＧこイ氏出
力の再生レーザービームを照射して変調反身・１ビーム
を受光し再生信号を導出する光学式ディスクレコーダに
於て、 Ｉ）；）記記録トラック形成直後、診記Ｇノトラ・ンク
カく再生レーザ−ビームによって記録性・１生力１劣イ
ヒしない様な温度に降ドする迄、該記録トラ・７り←こ
女・１する再生レーザ−ビームの照射を禁止−４−るこ
とを特徴とする光学記録制御機構。[Scope of Claims] (1) A recording trunk is formed by carrying a high-output recording laser beam modulated by a high-speed rotating TIF surface number recorder No. 18, and In an optical disk recorder that irradiates a reproduction laser beam output by Mr. G, receives a modulated beam, and derives a reproduction signal, immediately after forming a recording track, the medical record is recorded. Prohibit the irradiation of the reproducing laser beam that causes the recording track until the temperature drops to such a level that the reproducing laser beam will not degrade recording performance or performance. An optical recording control mechanism featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58066553A JPS59191149A (en) | 1983-04-14 | 1983-04-14 | Mechanism for controlling optical record |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58066553A JPS59191149A (en) | 1983-04-14 | 1983-04-14 | Mechanism for controlling optical record |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59191149A true JPS59191149A (en) | 1984-10-30 |
| JPH0320821B2 JPH0320821B2 (en) | 1991-03-20 |
Family
ID=13319215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58066553A Granted JPS59191149A (en) | 1983-04-14 | 1983-04-14 | Mechanism for controlling optical record |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59191149A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60214432A (en) * | 1984-04-09 | 1985-10-26 | Olympus Optical Co Ltd | Optical information recording and reproducing device |
| JPS61142538A (en) * | 1984-12-13 | 1986-06-30 | Matsushita Electric Ind Co Ltd | Optical information recording and reproducing device |
| JPS6214343A (en) * | 1985-06-28 | 1987-01-22 | アルカテル・トムソン・ジガデイスク | Optical memory with sample tracking for preformat information medium |
| EP0223576A2 (en) * | 1985-11-14 | 1987-05-27 | Fujitsu Limited | Light control circuit of an optical disc system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5525892A (en) * | 1973-02-20 | 1980-02-23 | Mca Disco Vision | Device for monitoring stored information in video disk and method thereof |
-
1983
- 1983-04-14 JP JP58066553A patent/JPS59191149A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5525892A (en) * | 1973-02-20 | 1980-02-23 | Mca Disco Vision | Device for monitoring stored information in video disk and method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60214432A (en) * | 1984-04-09 | 1985-10-26 | Olympus Optical Co Ltd | Optical information recording and reproducing device |
| JPS61142538A (en) * | 1984-12-13 | 1986-06-30 | Matsushita Electric Ind Co Ltd | Optical information recording and reproducing device |
| JPS6214343A (en) * | 1985-06-28 | 1987-01-22 | アルカテル・トムソン・ジガデイスク | Optical memory with sample tracking for preformat information medium |
| EP0223576A2 (en) * | 1985-11-14 | 1987-05-27 | Fujitsu Limited | Light control circuit of an optical disc system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0320821B2 (en) | 1991-03-20 |
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